208 
ARACHNIPA. 
details various experiments upon Scorpio occitanus (Europe), with the object 
of ascertaining the effect of its poison. The following conclusions are drawn : 
— 1, that the poison acts directly on the red globules of blood, and only upon 
them j 2, its action is to deprive the globules of the property of self-motion j 
3, in losing this property they become agglutinated together in masses, which 
obstruct the entrances to the capillaries and stop circulation. The action 
appears to be quantitative and purely chemical. 
Simon, R. Z. (2) xxiii. pp. 51-69, 97-101, pi. 6, restores the name Hetero- 
metrus (Hempr. & Ehrenb.) to Biithus (Koch & al.), redescribes 4 known 
spp., and the following spp. nn. : — II. rocseli, coast of Guinea, and II. swam- 
merdamij flindustan, pp. 61-59, pi. 6. 
PSEUDOSCORPIONIDES. 
Metschnikoff, in his Entwicklungsgeschichte des Chelifer ” (Z. wiss. 
Zool. 1871, pp. 613-627, pis. xxxviii. & xxxix.), describes at length and 
figures the development of Chelifer j from the earliest embryo to birth. 
PHALANGIDEA. 
Opilionides. 
. 0. Koch, Arch. f. Nat. xxxvii. pp. 52-91, in Beitrage zur Kenntniss der 
Opilioniden des Mittel-Rhein-Gebietes,” characterizes a new genus near 
Opilio, Oligolophtcs (p. 63), comprising Acantholophus terricola^ 0. Koch, and 
O. moUiSf sp. n., p. 66, Frankfort j and describes as spp. nn. Cerastoma longipesj 
p. 76, Frankfort, C. dentatum, p. 77, and Platylophus leucophthalmus, p. 81, 
Dillenburg. 
Canestbini (Ann. Mus. Genov, ii. pp. 5-48, t. i.-iii.) records 27 spp. of 
various genera of Italian Opilionides ^ describing as new Ischyropsalis den- 
tipalpis, p. 9, Apennines, Homalonotus dep?'essus, p. 24, Spezzia. 
ACARIDEA. 
Hanwell, in Sc. Goss. 1870, p. 99, notes (and figures) an unnamed species 
of Acaridea as parasitic in the larval state upon a sandfly, which Walker 
(ibid.) determines to be either Actora cestivum or Coelopa frigida. 
Rondani, L. L’Acaro del baco di Seta, e TAcaro del Gelso. Giorn. Agric. 
d’ltal. xiii. This the Recorder has not seen. 
Thomas (Sep. Abdr. Verb. St. Gall. Ges. 1870-71, pp. 1-16) continues 
his notices of Swiss Phytoptij with remarks on plants affected by them. 
Donnadieu, in ^‘Recherches Anatomiques et Zoologiques sur le genre 
Trichodactyle,” Ann. Sc. Nat. (6) x. pp. 09-5, 1 pi., treats under Considera- 
tions Generales ” of the systematic position of the genus Trichodactylm (Duf.), 
and reviews the works of previous authors upon it. Under Anatomie ” the 
external (but not internal) structure is minutely gone into. The genus is 
then concisely characterized, and two species (including T. xylocopce, sp. n., 
France ?) are described j both are figured, and numerous dissections given, 
showing various peculiarities of structure. 
The same author, Journ. de Zool. pp. 46-52, supposes the Acarus causing 
the Erinosis of the vine to be the larva of a species of Der^nanyssus. 
0, J. Giebel, “ Ueber einige Milben,’’ Z. ges. Naturw. iv. pp. 29-32, Taf. i.- 
iii., figures 12 known species of Hypoderus, 1 of SarcopteruSy and 1 of Der~ 
manyssusy D. nitzschi, sp. n., from the nostrils of Caprimulgus europceus. 
